Oral irrigator



FIG. 1 is a front perspective view of the oral irrigator showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines illustrate portions of the oral irrigator that form no part of the claimed design. 

CLAIM The ornamental design for an oral irrigator, as shown and described. 